fig wrote:If all else fails drill out the screws, but you may have trouble finding replacements and it's hard on drill bits.
I had to drill mine out on the fleetline, but not all the way, just drill partially into the head of the screw. I purchased this tool that has a reverse thread of some sort and screws into the seized screw, as it's thread turns the other way it forces the old screw out. I had to use this as the phillips head screw was stripped. Using this tool I was able to use more leverage to turn the screws out. I don't know what it is called off hand. I can check when I am back home after the weekend.
This obviously will not work if the screw is really seized in place, then it will have to be drilled out.
I was able to get replacement screws from a nut & bolt shop except they were countersunk allen key screws instead of a phillips head.